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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0188f596d179ec9c54a35d0d07673da614299fb7385c32a53448e3e80e183b10' 
  AND token = 'HinsXsW11bYUtc4dmx98X3MkrQbl4W+n6neKnR1xB0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}